SNPP VIIRS RSB earth view reflectance uncertainty

Lei, Ning; Twedt, Kevin A.; McIntire, Jeff; Xiong, Xiaoxiong

doi:10.1109/igarss.2017.8128355

Cited by 12 publications

(2 citation statements)

References 7 publications

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“…The calibration performance across all wavelengths is also monitored routinely using vicarious measurements of pseudo invariant ground targets as well as cross-calibration with other instruments. The MODIS and VIIRS on-orbit calibration uncertainties have also been assessed and details of these analyses can be found in a number of references [53][54][55].…”

Section: On-orbit Performancementioning

confidence: 99%

MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products

et al. 2020

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Terra and Aqua Moderate Resolution Imaging Spectroradiometer (MODIS) have successfully operated since their launches in 1999 and 2002, respectively, and generated various data products to support the Earth remote sensing disciplines and users worldwide for their research activities and applications, including studies of the Earth system, and its changes over time and geographic regions. The MODIS data have also significantly contributed to the continuity of multi-decadal satellite data records and led to major advances in the Earth remote sensing field. The long-term data records from MODIS observations have been and will continue to be extended by the Visible Infrared Imaging Radiometer Suite (VIIRS) instruments, currently operated aboard the Suomi-National Polar-Orbiting Partnership (NPP) and NOAA-20 satellites. The data quality of satellite instruments strongly depends on their calibration accuracy and stability. In order to help scientists and users gain a better understanding of MODIS and VIIRS data quality, this paper provides an overview of their on-orbit calibration methodologies, approaches, and results derived from instrument on-board calibrators and lunar observations, as well as select Earth view targets. What is also discussed is the calibration consistency between MODIS and VIIRS and its potential impact on producing multi-sensor long-term data records. As illustrated, the overall performance of both MODIS and VIIRS continues to meet their design requirements.

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Section: On-orbit Performancementioning

confidence: 99%

MODIS and VIIRS Calibration and Characterization in Support of Producing Long-Term High-Quality Data Products

et al. 2020

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“…The VIIRS RSB also has an uncertainty requirement of 2% in the top-of-atmosphere reflectance. 25 For the VIIRS lunar data, an empirical fit is applied to reduce the libration oscillations, resulting in a relative accuracy of around 0.1%.…”

Section: Lunar Observations From Roll Maneuversmentioning

confidence: 99%

Planning lunar observations for satellite missions in low-Earth orbit

Wilson

Xiong

2019

J. Appl. Rem. Sens.

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For Earth-observing satellites in low-Earth orbit, radiometric calibration of the sensors on-orbit is critical for maintaining consistent Earth-view (EV) retrievals as the mission progresses. Many of these satellite instruments use on-board calibration targets, EV sites, and observations of celestial targets in order to perform the sensor characterization. Among the celestial targets, the Moon is widely used across a range of Earth-observing instruments in order to perform radiometric calibration, spatial characterization, and sensor intercomparison. Since many of these instruments use satellite maneuvers in order to bring the Moon into view at a desired time, calculating the time and geometric parameters of the observations is vital for mission planning purposes. We develop a simple tool for planning such observations of the Moon and other celestial targets for instruments in low-Earth orbit based on the SPICE toolkit developed by the Navigation and Ancillary Information Facility at NASA. Given a set of satellite orbital data along with a definition of the instrument coordinates, the tool is designed to provide the timing of observations for an arbitrary view-port direction and a maneuver along an arbitrary axis relative to the spacecraft. The tool can be tested versus known lunar observations for the Aqua and Terra moderate resolution imaging spectroradiometer and the Suomi-NPP and NOAA-20 visible infrared imaging radiometer suite instruments for both roll and pitch maneuvers. We also perform simulations of lunar observations for different instrument configurations, orbits, and maneuver types in order to analyze the change in the potential lunar observations. Finally, we show a simple extension of the tool which can be used for identifying planet and star observations.

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